The effect of environmental conditions of the open channel period on the relative body condition of semianadromous burbot,Lota lota L. (Lotidae), in the Ob River

The results of long-term observations on changes in the relative body conditions of burbot (Lota lota L.) in the Lower Ob basin during the open channel period (June–September) are analyzed. Statistically significant strong positive dependence of the hepatosomatic index of spawners on the maximum flood level is revealed. An equation predicting the value of the hepatosomatic index of spawners from instrumentally measurable environmental parameters is constructed.     

The Dependence of the Duration of Downstream Migration of Burbot (Lota lota) Larvae on the Hepatosomatic Index of Spawners

Russian Journal of Ecology - This study estimates the dependence of the duration of the downstream migration of burbot larvae in the Voikar River (the Lower Ob basin) on the relative condition...     

Assessment of Changes in the Distance of Spawning Migrations of Semianadromous Burbot (Lota lota L., 1758) Spawners Based on Long-term Records of the Abundance of Downstream Migrating Larvae

Russian Journal of Ecology - The distance of spawning migrations of semianadromous burbot spawners is reconstructed based on long-term (2000–2017) records characterizing the contribution of...     

Ecological,morphological, and genetic diversity of burbot (<Emphasis Type="Italic">Lota lota</Emphasis> L., 1758) in large river basins of Western Siberia

A study has been performed on the ecological, morphological, and genetic diversity of burbot (sample size n = 204 and n = 134, respectively) from eight localities of the Ob–Irtysh and Taz river basins, Western Siberia. Fish differentiation in body size and weight depending on the dominant type of migration behavior, foraging conditions, and physiographic features of habitats has been revealed. A high genetic diversity (854-bp mtDNA control region) and a low level of between-sample differentiation is evidence for high intergroup gene flow.     

Changes in the hepatosomatic index of semianadromous burbot, Lota lota L. (Lotidae), in the Ob River depending on fish physiological state and foraging conditions

The results of long-term observations on changes in the hepatosomatic index of burbot in the Lower Ob basin are presented. The dynamics of this index are considered as dependent on fish sex, stage of gonad maturity, period of reproductive cycle, body damage or abnormalities, and feeding intensity.     

Impact of the Development of Hydrocarbon Deposits on Water Ecosystems of the Yamal Peninsula

Russian Journal of Ecology - Data of monitoring studies (2014–2016) on the state of hydrobionts in watercourses during the development of a hydrocarbon deposit on the Yamal Peninsula have...